Suitable Specimen Types

  • Plain Spot Urine
15 mL random urine minimum

Specimen Transport

First class post to referral laboratory

Sample Processing in Laboratory


Turnaround Time

48 hours

Sample Stability

Store specimens at 4ÂșC

Laxative Screen

General Information

The four most common \"stimulant\" type laxatives (bisacodyl, danthron, phenolphthalein and rhein) may be detected in urine.

Patient Preparation

The sampling strategy is often an important factor in the detection or confident elimination of laxative abuse. Thus, it is worthwhile considering obtaining specimens on two or three consecutive days and submitting these for analysis as a batch.


Please contact the Duty Biochemist prior to request

Setrile plastic container without preservative required. Faecal specimens should NOT be sent for analysis.


Reference Range

Interpretation advice from referral laboratory


  • EQA Scheme?: Yes

The laboratories at Heartlands Hospital, Good Hope Hospital and Solihull Hospital form part of the services provided by University Hospitals Birmingham and are UKAS (United Kingdom Accreditation Service) accredited to the ISO 15189:2012 standard. For a list of accredited tests and other information please visit the UKAS website using the following link:

  • Heartlands, Good Hope and Solihull Hospital pathology laboratories are a UKAS accredited medical laboratory No.8217
  • United Kingdom Health Security Agency laboratory is a UKAS accredited medical laboratory No.8213

Tests not appearing on the UKAS Schedule of Accreditation currently remain outside of our scope of accreditation. However, these tests have been validated to the same high standard as accredited tests and are performed by the same trained and competent staff.

For further test information, please visit the test database:

Protection of personal information - Laboratory Medicine comply with the Trust Data Protection policy and have procedures in place to allow the Directorate and its employees to comply with the Data Protection act  1998 and associated best practice and guidance.

For further information contact Louise Fallon, Quality Manager, 0121 424 1235